This paper presents a method for the separation of CO₂/CH₄ and CO₂/N₂ by the use of disk supported carbon membranes derived from polyimide. The supported polyimide membranes were carbonized under controlled gas flow (three different atmospheres: N₂, Ar and He) at different carbonization temperatures from 600 to 900 °C. The carbon membrane fabricated at various carbonization temperatures and atmospheres, showed improvement in gas permeation performance. The gas permeability increased with the increase of carbonization temperature due to densification of the micropores in the carbon membranes, leading to enhanced gas permselectivity. All carbon membrane samples carbonized under three different atmospheres at 800 °C surpassed the polymeric CO₂/CH₄ upper bound. Pure-gas permselectivity reached 98 for the carbon membrane carbonized at 800 °C under He gas flow, with CO₂ permeability of about 120 Barrer, becoming the most selective carbon membrane for CO₂/CH₄ separation.

本文提出了一种使用衍生自聚酰亚胺的圆盘支撑碳膜分离CO ₂ / CH ₄和CO ₂ / N ₂的方法。负载的聚酰亚胺膜在受控的气流下碳化（三种不同的气氛：N ₂，Ar和He）在600至900°C的不同碳化温度下。在各种碳化温度和气氛下制备的碳膜显示出改善的气体渗透性能。由于碳膜中微孔的致密化，气体的渗透性随碳化温度的升高而增加，从而提高了气体的渗透选择性。在三种不同气氛下，在800°C下碳化的所有碳膜样品均超过了聚合的CO ₂ / CH ₄上限。在He气流下于800°C碳化的碳膜的纯气渗透选择性达到98，CO ₂渗透率约为120 Barrer，成为对CO ₂ / CH ₄最具选择性的碳膜。 分离。